The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 30, 1997
Filed:
Mar. 19, 1993
Applicant:
Inventors:
Herbert Russell Gillis, West Deptford, NJ (US);
Dirk Stanssens, Lanaken, BE;
Rik De Vos, Rotselaar, BE;
Aaldrik Roelf Postema, Loosdrecht, NL;
David Randall, Everberg, BE;
Assignee:
Imperial Chemical Industries plc, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ; C08J / ; C08K / ; C08K / ;
U.S. Cl.
CPC ...
521128 ; 521114 ; 521130 ; 521131 ; 521132 ; 521159 ; 521163 ; 521164 ; 521166 ; 521172 ; 521173 ;
Abstract
A method for the preparation of rigid foams by reacting an organic polyisocyanate with an isocyanate-reactive material in the presence of a blowing promoter characterized in that the isocyanate-reactive material comprises at least one isocyanate-reactive cyclic carbonate or isocyanate-reactive cyclic urea, the reaction being performed in the presence of an inert insoluble organic liquid which is present as the disperse phase of an emulsion or a microemulsion, and in the presence of a metal salt catalyst.